We're pretty happy to accept "I pulled the trigger because I thought my life was in danger" as a reason to not punish someone for killing... many are happy with

We're pretty happy to accept "I pulled the trigger because I thought my life was in danger" as a reason to not punish someone for killing... many are happy with "I pulled the trigger because I thought my property was in danger". Some are even happy with "I pulled the trigger because they were threatening me for pointing a gun at them". The reason for the trigger pull, it turns out, matters quite a bit to people.